Add Milestones 1 & 2: full-stack POS foundation with admin UI

- Node/Express/TypeScript API under /api/v1 with JWT auth (login, refresh, logout, /me)
- Prisma schema: vendors, users, roles, products, categories, taxes, transactions
- SQLite for local dev; Postgres via docker-compose for production
- Full CRUD routes for vendors, users, categories, taxes, products with Zod validation and RBAC
- Paginated list endpoints scoped per vendor; refresh token rotation
- React/TypeScript admin SPA (Vite): login, protected routing, sidebar layout
- Pages: Dashboard, Catalog (tabbed Products/Categories/Taxes), Users, Vendor Settings
- Shared UI: Table, Modal, FormField, Btn, PageHeader components
- Multi-stage Dockerfile; docker-compose with Postgres healthcheck
- Seed script with demo vendor and owner account
- INSTRUCTIONS.md, ROADMAP.md, .claude/launch.json for dev server config

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

server/node_modules/tsx/dist/get-pipe-path-BoR10qr8.cjs

@@ -0,0 +1 @@
+"use strict";var u=Object.defineProperty;var t=(r,e)=>u(r,"name",{value:e,configurable:!0});var d=require("module"),n=require("node:path"),p=require("./temporary-directory-B83uKxJF.cjs"),s=typeof document<"u"?document.currentScript:null,o=require;const i=process.platform==="win32",c=t(r=>{const e=n.join(p.tmpdir,`${r}.pipe`);return i?`\\\\?\\pipe\\${e}`:e},"getPipePath");exports.getPipePath=c,exports.isWindows=i,exports.require=o;